Originally Posted by herolee10
Considering on how powerful Surtur has been made out to be, I'm surprised that he hasn't made into an Avengers villain as well, more so than Thanos.
Surtur's had a few run-ins with the Avengers. During "Fire and Ice," he and Ymir were summoned to Earth and the Avengers had to fight both of them. And I'm pretty sure Surtur was part of the "Acts of Vengeance" where villains were paired up against heroes who weren't typically their archenemies.